I all but destroyed my old front D60 housing, but I had another so I chose to swap housings, and while I was at it, install a 4 link. Now that all the 4 link brackets and such are welded to the new housing I set about installing my old gears and ARB locker. This is the part I need help with! The ARB is a very tight fit with no shims instaled, let alone trying to put in the master shim or any other shims. Bottom line is I don't know why I can't fit any shims in. Any ideas?